Charleroi (-frʃaʁləʁwa, "King Charles", ) is a city and a municipality of Wallonia, located in the province of Hainaut, Belgium. , the total population of Charleroi was 201,593. The metropolitan area, including the outer commuter zone, covers an area of 1462 km2 (1462000000 m2) and had a total population of 522,522 as of 1 January 2008, ranking it as the fourth most populous in Belgium. The inhabitants are called Carolorégiens or simply Carolos.